Hampshire · England
Selborne New Build Mastic
New-build sealant joints in Selborne need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps behind new kitchen upstands
- Sealant applied over dusty or wet surfaces
- Leaking shower tray seals in a new home
Different surfaces, different methods
Kitchens
Beside the sink, the joint takes water every day. We use a sealant suited to kitchens, food-safe where it’s needed.
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
New build mastic in Selborne
In a new home, every joint should have a clean, even bead. Smeared, patchy or cracked sealant is worth sorting early, before water reaches anything behind it. We work on show homes, windows & doors and kitchens, and the jobs we see most are cracked sealant around new window and door frames and smeared, uneven beads picked up at snagging.
Somewhere as small as Selborne, new homes tend to be conversions, self-builds or a few houses rather than an estate. Each still needs its sealant and floor joints finished properly.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Selborne (GU34)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Selborne
What else we do in Selborne
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours in a single home. For a village or hamlet like Selborne, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked for movement before any work starts.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Mention any tricky access
- Tell us about any water getting in
- Tell us if parking is tricky
How to get a quote
If you are in Selborne and need new build mastic, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Leave it or put it right?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. In a small place like Selborne, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why choose Mr Mastic in Selborne
- Sealant colour chosen to suit
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- Neat joints and a tidy finish
Read what affects the cost and our reviews.
Selborne: your questions answered
Is Selborne within the area you cover?
Yes. Selborne is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do new build mastic in Selborne?
Yes, Selborne is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early as timber and plaster dry out. Poor preparation at handover adds to it.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Baths and trays that move too much for sealant to cope with
- Plumbing faults behind the sealant
- Damaged fittings that need replacing
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Plot handovers
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Show homes
- Kitchens
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
New homes and floors in Selborne
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Selborne, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Alton station, the sealant around baths, showers and frames is worth checking in the first year or two.
Selborne is about 4 miles south of Alton, in Hampshire. Whether you are in the middle of Selborne or further out, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. 683 places in Hampshire are on our list, large and small. Portsmouth is on our list too, about 21 miles from Selborne.
Every address in GU34 is covered for new build mastic. Whether your property is on Huckers Lane, Ganders Close and Selborne Road or a nearby road, our applicators can take on the job. We also cover Newton Valence (1 mile west), Empshott (2 miles south-east), Lower Green (3 miles south), Hawkley (3 miles south) and Oakshott (4 miles south). We also work in nearby towns such as Basingstoke (13 miles north-west), Fleet (13 miles north), Horndean (14 miles south), Aldershot (13 miles north-east), Alton (4 miles north) and Waterlooville (15 miles south).
What’s near Selborne
Around Selborne, our work takes us to homes and buildings near The Jubilee Tap. The closest station to Selborne is Alton station, roughly 3.8 miles north of the centre. Nearby you will also find The Romany Museum (under half a mile south-east) and Alton Community Hospital (3.5 miles north-west). For a walk, there’s Selborne Hill and Deadwater Valley.
How to look after the new joints
So the new joints stay in good condition:
- Get a leaking seal dealt with right away
- Report sealant problems to your builder during the snagging period
- Watch for new gaps as the house dries out
- Photograph failed sealant before it’s redone
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
Landlord and commercial work in Selborne
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Letting agents and landlords in Selborne can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.